Punnett Square

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Aa.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even when only one copy is present, while recessive alleles only express their trait when two copies are present.

Front

What is the phenotypic ratio?

Back

The phenotypic ratio is the ratio of different phenotypes produced in the offspring from a genetic cross.

Front

What is the genotypic ratio?

Back

The genotypic ratio is the ratio of different genotypes produced in the offspring from a genetic cross.

Front

If a black mouse (Bb) is crossed with a white mouse (bb), what are the possible genotypes of the offspring?

Back

The possible genotypes are Bb (black) and bb (white).

Front

What is the expected phenotypic ratio from a cross between two heterozygous parents (Bb x Bb)?

Back

The expected phenotypic ratio is 3 Black: 1 White.